Runner ring



A. L. HARTENSTEIN 2,754,563

July 17, 1 956 v RUNNER RING 4 Sheets-Sheet 1 Filed Nov. 8, 1951 FIG. 4.

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aw m 2 5 5 M/ 7 3 2 3 6 2 2 2 a m .l. 5 mfixhk y 7, 1956 A. L. HARTENSTEIN 2,754,563

RUNNER RING 4 Sheets-Sheet 2.

Filed Nov. 8, 1951 INVENTOR ALBERT L. HARTENSTEIN 262937 I ll I9 ll 7% fi la...

ATTORNEYS 17, 1956 A. L. HARTENSTEIN 2,754,563

RUNNER RING Filed Nov. 8, 1951 4'Sheets-Sheet 3 FIG. 8.

A II II:

INVENTOR ALBERT L. HARTENSTEIN 70mm VMM ATTORNEYS y 17, 1956 A. L. HARTENSTEIN 2,754,563

RUNNER RING 4 Sheets-Sheet 4 Filed Nov. 8, 1951 FIG. 5A.

INVENTOR ALBERT L. HARTENSTEIN ATTORNEYS 2,754,563 RUNNER RING Albert L. Hartenstein, Southgat e, Calift, assignor to American Pipe and Construction Co., a corporation of Delaware Application November 8, 1951, Serial N 255,441 12' elai'ms. (01125-126 invention to do generally with the making es eenrr'irugally spun eoner'ete' pipe and particularly with the molds for such pipe.

4 In the manufacture of centrifugally spun concrete pipe, the lii'old is supported upon ave or more pairs of trunnions or rollers, one or more" of the rollers being driven to impart rotation to the mold. Usually the mold is provided with runner rings each of which may be likened to a circular trac'k around the periphery of the mold, and these rest' on" the t'ru nnions or rollers.

molds are longitudinally split" from end to' end at one or more places in order to permit removal of the completed pipe from the mold: In view of this the runner rings must either permit of the eXp'ansion of the mold while on the mold or must be removable for this purpose: It has been customary to use runner rings which are detachably mounted upon the n'iold and se cured by bolts. These are notentirely satisfactory because they come loose in the operation of spinning the mold with consequent jarring and damage to both the pipe mold and the runner rings. some attempts have been made to provide a runner ring which is permanently attacht-zd to the pipe mold and provides space within itself for the expansion of the mold when the same is opened to remove the completed pipe. This latter ty e of runner ring construction, so far as I am aware, has not proved rugged enough to successfully withstand the abuse itmust take; As a result this type often vibrates so badly as to cause cracking of the mold or the runner ring; itself.

An object of this invention is to provide a novel run ner ring construction which overcomes the above-noted disadvantages of presently used or known'type's' of runner ring assemblies andwhich has certain advantageous fea:

tures thereover.

A: particular objectis to'provitle a-runner ring'assen bly which is essentiallysimple in construction; which is eas to assemble upon the pipe mold, and which, when as:

Anotherobject is to provide a durable construction in a runner ring assembly.

These and other objects willbe apparent from the drawings and the'following: description:

Referringto thedrawingsg Fig; 1 is 'a side elev'ational view of a' pipe'rnoldha'ving two runner ringassemblies thereon embodying the invention;

nited States Patent 0 2,7 54,563 Patented July 17,1956;

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Fig. 2"- is a cross section on line 2-2 of Fig. I but on an enlarged scale; 7

Fig. 3 is a cross section on line 3-3' of Fig. I on the same scale as Fig". 2;

Fig 4' is" a sectional view on line 44 of Fig. 2 but on a larger scale; i

Fig. 5 is a section on line 55 of Fig. 2 oh the same scale as Fig. 4. y M

Fig. 6" is a partial sectional view similar to Fig. 2 illils rating a modified form or the invention; I

Fig. 7 is a partial sectional view similar to Fig. 3 showing the opposite side of the apparatus of Fig. 6; and

Fig. 8 is a section on line 88 o'fFig. 6. p

More particularly describing the invention, numeral ll) g'eherally indicates a pipe mold having a shell 11 which is longitudinally split at 12 from end to end so'ith'at it can be partially opened or expanded to facilitate" removal of a pipe formed therein. In the region ol' th e split- 12 the shell is provided with the flanges 13 which are serenity bolted together, as by bolts 14'. Diamet'ri- Cally' opposite the flanges 13 is a double flange 15' which is provided" for the purpose of counter-balancing the flan es 1s On the mold shell H l shew a pair of runner ring assemblies, generally indicated by numeral 16. As previ eusl'y indicated, each of these assemblies is designed-to ru'rlup'on a pair of steel rollers or trunnions for the purpose or supporting and spinning the mold in a' manner well known in the art. Referring particularly to Figs. to 5', the coiistruction of these runnef ring assemblies will now; be described. I p

Wherever a-fun-ner rihgis to be" mounted; thepipe nio ld shell 1 1 is" provided with a" pair'of arc'uate' base plates 18 whih il'feri'tl al dil'lltlitlie periphery of the shell between the flanges 13 and 15 being welded thereto as by welds 19. Rigidly mounted on the base plates are a plurality of anchor lugs 2f and 21.- Two anchor lugs 21 which are r'elativelylong' are provided one on each side of the flange 15: Spaced circumferentially from the lugs 21 are two groups of shorter lugs 21". Each group extends from one of the flang s 13' to a point about ci'reuinfereiitially of the" mold; The anchor lugs 21 and'21 arepfefei abl'y welded at 22' to the base plates and eachis provided with anax'ially projecting tapered flange 24.

I alsoiovidewhat Will be termed a runner ring" 25 which presents an outef peripheral" surface 26 for engage mentwith the rollers or trunnions and a flange 27 for r'e'tai'tiihg the runner ring on' the trunnions. The runner ring is provided with a radially inwardly extending mounting ring 29- ha'virlgan axially projecting flange 30' which is similar in ero's's' seetionto the" flanges 24 on members IL -21'.

On'oiie'side 'I pr'dvide apair' of back-up bars, generally indicated by numeral 32; These bars' include a main seetioii 33'to' which arer'igidly secured an outer axially 35- as by weldsas shown. The bars are apertured-a'sat' 37' toreeeive bolts" 38 which, in conjunction with; tie bars 41 and 41 and nuts 42 are used for securing the runner ring totheaiielior lti' I prefer" to provide two relatively short tie bars 41" whibhare" coextensive in length with the anchor lugs 21 and to-providetwo tie bars41' which are co-'eXte'ri-'" sive iri' le'ngth with each group of anchor lugs 21'. One bolt is provided foreacli' tie bar 41 and two bolts for eaeh tie bar 41'.

The tie bars are formed:- on their inner sides to pro videa c'entral tbngue'43an'd a pair of recesses of grooves;

indicated by 44 and- 45; are on eachside of-the tongue.-

The recesses receive the flanged portions'24'ar1 d 30 of the anchor lugs 21 -21 and ring 29, respectively; the tongue 43 fitting between these parts. The parts are tapered somewhat as shown to facilitate seating and rigid assembly thereof.

I prefer to lock the bolts in the back-up bar and for this purpose I provide bolt-head covering plates 46 and bolt-head side plates 47 on the back-up bar, these being welded in place as shown.

The back-up bars are also provided with a plurality of radially extending tabs 50 which are welded to the flanges 34 and 35 of the bars. These tabs are apertured to receive bolts 51 which are received in threaded bores 52 in the runner ring 25.

In the operation of the runner ring assembly the individual runner rings are assembled on the pipe mold with the pipe secured along the flange 13. After a pipe has been spun the pipe shell may be expanded without removing the runner ring assemblies from the shell merely by loosening the nuts upon the bolts 38 extending through the tie bars 41'. This permits sufficient expansion of the pipe shell radially within the runner rings through about 220 of the circumference of the pipe shell to permit easy removal of the formed pipe from the mold. In Fig. A I show the parts in expanded position. It will be noted that nut 42 has been backed off sufficiently to permit the tie bar 41 to be moved to the left sufficiently to withdraw the tongue portion 43 thereof from between the lug 21' and the mounting ring 29 thereby permitting expansion radially of the lug 21' and the mold shell within the mounting ring 29.

Referring now to Figs. 6-8, I show a modified or alternate form of the invention. Numeral a generally indicates a pipe mold split at 12a and similar to mold 10 previously shown and described. The runner ring construction includes a pair of base plates 66 of arcuate form which are welded to the periphery of the mold shell as shown. A plurality of mounting lugs 67 of limited length are mounted on the plates 66 as by welding. These are preferably of substantially the same size and are approximately evenly circumferentially spaced. Each mounting lug has a base portion 68 and an axially projecting flange portion 69. When the mounting lugs are installed and after being welded in place they may be machined to insure their providing surfaces in the region of the flange 69 and on their outer ends which are concentric with the mold shell.

I provide a runner ring 70 which has an external flange 71. This ring also is provided with an internal or radially inwardly projecting mounting ring 72 which terminates in an end portion 73 of lesser width and an axially projecting flange 74, similar in cross-sectional shape to the flanges 69 on the mounting lugs.

The runner ring 70 is detachably secured to the mold by means of a pair of back-up bars 78, a plurality of tie bars 80-80, and bolts 81.

More particularly describing these parts, the back-up bars 78 are each provided with three or more apertures 82 for receiving bolts 83 by means of which the bars are attached to the mounting ring 72 of the runner ring, the ring 72 being provided with a flat surface 85 against Which the back-up bars seat. The back-up bars are also provided with four apertures 86 for receiving the aforementioned bolts 81. If desired, the back-up bars may be provided with a shelf 88 and plate 89 for each bolt head.

On the opposite side of the assembly I provide four of the tie bars 8080'. In the region of the split in the mold shell, and extending circumferentially therefrom a little over 90 degrees I position the two long tie bars 80 and beyond these two short bars 80. The long tie bars are coextensive in length with the first six mounting lugs and the two shorter tie bars are coextensive with the two mounting lugs on each side farthest from the split in the shell. These tie bars are formed to provide a central tongue 91 which is received between mounting ring 72 of member 70 and the outer portion of the mounting lugs 67. The tie bars are also provided with arcuate recesses 92 and 93 to receive the flanged portions 74 and 69, respectively, of the parts 72 and 67. The tie bars are also apertured at 95 to receive the bolts 81. When nuts 96 are tightened on the bolts, the assembly is made secure.

In the assembly of the parts, the back-up bar 78 is secured to the mounting ring 72 of member 70 and these assembled parts are then positioned against the mounting lugs after which the tie bars can be placed in position and secured by bolts 81 and nuts 96.

After a pipe has been spun in the mold and it is desired to remove the same from the shell it is possible to expand the shell within the runner rings by loosening the bolts 81 extending through tie bars and since these bolts are located between the mounting lugs, the latter may move radially outwardly therebetween. With both constructions disclosed, it is an easy matter to remove the runner ring for resurfacing when necessary.

Although I have shown and described two preferred forms of the invention, I contemplate that various changes and modifications can be made therein without departing from the scope of the invention and I intend to cover such changes and modifications as come within the fair scope of the claims appearing hereinafter.

I claim:

1. In a pipe mold, a longitudinally split cylindrical shell, a plurality of anchor lugs arranged circumferentially of the shell on the periphery thereof, an endless runner ring around said shell adjacent said lugs and spaced radially of the shell, said runner ring being spaced radially outward of said anchor lugs, and means detachably securing said runner ring to said lugs, said last-mentioned means radially overlapping said lugs and said runner ring and being adjustable to permit expansion of said shell within said runner ring.

2. In a pipe mold, a longitudinally split cylindrical shell, a plurality of anchor lugs arranged circumferentially of the shell on the periphery thereof, an endless runner ring around said shell adjacent said lugs and spaced radially of the shell, a mounting ring on said runner ring projecting radially inwardly toward said mounting lugs, back-up bar means overlapping said lugs and said mounting ring on one side thereof, tie bar means overlapping said lugs and said mounting ring on the other side thereof, and bolt means securing said back-up bar and said tie bar.

3. A construction as defined in claim 2 in which said tie bar means and said mounting ring and anchor lugs are formed to provide arcuate interengaging means for prevential radial displacement of said runner ring relative to said anchor lugs.

4. A construction as defined in claim 2 in which said anchor lugs and said mounting ring are provided with axially projecting flange portions and said tie bar means is provided with concentric recesses for receiving the flange portions respectively of the anchor lugs and mounting ring.

5. A construction as defined in claim 2 in which said anchor lugs and said mounting ring are provided with axially projecting flange portions and said tie bar means is provided with concentric recesses for receiving the flange portions respectively of the anchor lugs and mounting ring, and in which said tie bar means is provided with an axially projecting tongue receivable between said mounting ring and said anchor lugs.

- 6. A construction as defined in claim 2 in which there are a plurality of tie bars.

7. A construction as defined in claim 2 in which there are two back-up bars and a plurality of tie bars.

8. In a pipe mold, a longitudinally split cylindrical shell, a plurality of anchor lugs arranged circumferentially of the shell on the periphery thereof, an endless runner ring around said shell encircling said lugs, a mounting ring on said runner ring projecting radially inwardly toward said mounting lugs, back-up bar means overlapping said lugs and said mounting ring on one side thereof, tie bar means overlapping said lugs and said mounting ring on the other side thereof, and bolt means securing said back-up and said tie bar, said bolt means i being positioned at circumferentially spaced points in regions between said mounting lugs for a substantial proportion of the circumference of the mold on each side of the split thereof.

9. In a pipe mold, a longitudinally split cylindrical shell, a plurality of anchor lugs arranged circumferentially of the shell on the periphery thereof, an endless runner ring around said shell encircling said lugs, a mounting ring on said runner ring projecting radially inwardly toward said mounting lugs, back-up bar means overlapping said lugs and said mounting ring on one side thereof, tie bar means overlapping said lugs and said mounting ring on the other side thereof, bolt means securing said back-up bar and said tie bar, means radially extending circumferentially spaced tabs on said back-up bar, and bolts through said tabs threadedly secured in said runner ring.

10. In a pipe mold, a longitudinally split cylindrical shell, a plurality of anchor lugs arranged circumferentially of the shell on the periphery thereof, an endless runner ring around said shell encircling said lugs, a mounting ring on said runner ring projecting radially inwardly toward said anchor lugs, back-up bar means overlapping said lugs and said mounting ring on one side thereof, tie bar means overlapping said lugs and said mounting ring on the other side thereof, bolt means securing said back-up 6 bar and said tie bar, and bolts securing said back-up bar to said mounting ring.

11. In a pipe mold, a longitudinally split cylindrical shell, a plurality of anchor lugs fixed to said shell and spaced circumferentially thereof, an endless runner ring around said shell, a mounting ring on said runner ring projecting radially inwardly toward said lugs, a pair of back-up bars on one side of said mounting ring and said lugs and overlapping the mounting ring and lugs, a plurality of tie bars on the other side of said mounting ring and said lugs and overlapping said mounting ring and lugs, and bolt means securing said tie bars to said back-up bars, said bolt means being located at points spaced circumferentially of the mold and between said mounting lugs for a substantial distance circumferentially of the mold on each side of the split therein.

12. A construction as defined in claim 11 in which means are provided detachably securing said back-up bar to said mounting ring.

References Cited in the file of this patent UNITED STATES PATENTS 1,374,730 Gruenfeld, Jr. Apr. 12, 1921 2,194,028 Miller Mar. 19, 1940 2,623,260 lobe Dec. 30, 1952 FOREIGN PATENTS 102,907 Australia Jan. 28, 1937 

